JPMyers 1977 Calidris mauri Atkasook, Whale River, N.Slope Borough, Alaska 9 June western sandpipers are still displaying on the tundra today (see summary in 5-6 June Journal for previous obs). I find their habitat distribution puzzling: they certainly are most apparent on slopes near low flat wet areas or ponds + along stream courses. But that description could be used to fit almost any patch of tundra here. I've even found what is almost surely a monkey bird near the crest of the ridge in (14,30). The effect is to produce a decided pattern to their dispersion which cannot be simply explained on the basis of habitat distribution. There are hot spots of displaying birds - areas where repeatedly we find active P.B. in chance. And these sites often seem unpredictable from tundra physiognomy. The amount of aerial chasing is stupendous - groups of 3-4 or more chasing around whinnying, or a P1 floating above a site, croaking with its feet dragging. And their ground displays - spread wings, round tail are just as elaborate as possible.